Mating affects reproductive investment into eggs,but not the timing of oogenesis in the flesh fly <Emphasis Type="Italic">Sarcophaga crassipalpis</Emphasis> |
| |
Authors: | Daniel A Hahn Matthew N Rourke Kathy R Milne |
| |
Institution: | (1) Department of Entomology and Nematology, The University of Florida, P.O. Box 110620, Gainesville, FL 32611-0620, USA |
| |
Abstract: | We examined the effects of mating on reproductive investment and the timing of oogenesis in the flesh fly Sarcophaga crassipalpis by exposing females to males or not. All females exposed to males were mated within a few days and we found that mating affected
reproductive investment. Virgin females not exposed to males produced a large clutch of eggs (∼91), but females exposed to
males and mated produced 10% more. There was no effect of mating on egg length or mass. There was also no effect of mating
on the timing of oogenesis. Females in both treatments provisioned their eggs at the same rate with yolk first becoming visible
in the oocytes on day three of adulthood and complete provisioning of eggs occurring by the seventh day of adulthood. We examined
the biochemical basis of egg provisioning by identifying the yolk proteins and quantifying their blood titer during the oogenic
period in both, females exposed to males and mated and those not exposed to males. There was no difference in the timing of
the first appearance, peak titer, or disappearance of yolk proteins in the blood between the two treatments. However, consistent
with our observation of greater egg production in mated females, these females contained a greater peak yolk protein titer. |
| |
Keywords: | Mating Oogenesis Yolk protein Reproductive investment Reproductive timing |
本文献已被 PubMed SpringerLink 等数据库收录! |
|